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Message-ID: <1436323933.5489.290.camel@intel.com>
Date:	Wed, 08 Jul 2015 10:52:13 +0800
From:	Huang Ying <ying.huang@...el.com>
To:	Ander Conselvan de Oliveira 
	<ander.conselvan.de.oliveira@...el.com>
Cc:	Daniel Vetter <daniel.vetter@...ll.ch>,
	LKML <linux-kernel@...r.kernel.org>, LKP ML <lkp@...org>
Subject: [lkp] [drm/i915] 8c7b5ccb729: WARNING: CPU: 0 PID: 46 at
 drivers/gpu/drm/drm_irq.c:1159 drm_wait_one_vblank+0x180/0x190 [drm]()

FYI, we noticed the below changes on

git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
commit 8c7b5ccb729870e606321b3703e2c2e698c49a95 ("drm/i915: Use atomic helpers for computing changed flags")


+------------------------------------------------------------------+------------+------------+
>                                                                  | 840bfe9533 | 8c7b5ccb72 |
+------------------------------------------------------------------+------------+------------+
> boot_successes                                                   | 20         | 11         |
> boot_failures                                                    | 0          | 10         |
> WARNING:at_drivers/gpu/drm/drm_irq.c:#drm_wait_one_vblank[drm]() | 0          | 10         |
> backtrace:output_poll_execute                                    | 0          | 7          |
> backtrace:intel_fbdev_set_par                                    | 0          | 3          |
> backtrace:fbcon_init                                             | 0          | 3          |
> backtrace:visual_init                                            | 0          | 3          |
> backtrace:async_run_entry_fn                                     | 0          | 3          |
+------------------------------------------------------------------+------------+------------+


[   22.049656] input: HDA Intel HDMI HDMI/DP,pcm=7 as /devices/pci0000:00/0000:00:03.0/sound/card0/input8
[   22.049705] input: HDA Intel HDMI HDMI/DP,pcm=8 as /devices/pci0000:00/0000:00:03.0/sound/card0/input9
[   22.292948] ------------[ cut here ]------------
[   22.292963] WARNING: CPU: 0 PID: 46 at drivers/gpu/drm/drm_irq.c:1159 drm_wait_one_vblank+0x180/0x190 [drm]()
[   22.292964] vblank not available on crtc 0, ret=-22
[   22.292978] Modules linked in: snd_hda_codec_hdmi x86_pkg_temp_thermal coretemp kvm_intel snd_hda_intel snd_hda_controller kvm crct10dif_pclmul ahci crc32_pclmul crc32c_intel ghash_clmulni_intel i915 snd_hda_codec aesni_intel snd_hda_core lrw snd_hwdep libahci gf128mul glue_helper ablk_helper ppdev cryptd drm_kms_helper pcspkr serio_raw microcode snd_pcm i2c_i801 snd_timer libata snd soundcore drm sdhci_acpi winbond_cir rc_core sdhci parport_pc parport video i2c_hid mmc_core dw_dmac dw_dmac_core spi_pxa2xx_platform i2c_designware_platform i2c_designware_core acpi_pad
[   22.292979] CPU: 0 PID: 46 Comm: kworker/0:2 Not tainted 4.1.0-rc2-00294-g8c7b5cc #1
[   22.292980] Hardware name: Intel Corporation Broadwell Client platform/WhiteTip Mountain 1, BIOS BDW-E1R1.86C.0108.R00.1412212013 12/21/2014
[   22.292985] Workqueue: events output_poll_execute [drm_kms_helper]
[   22.292987]  ffffffffa0174da8 ffff8801493f3948 ffffffff818e42b9 0000000050785078
[   22.292988]  ffff8801493f3998 ffff8801493f3988 ffffffff8107666a 0000000000000000
[   22.292989]  ffff88007e810000 ffff88008cb46800 0000000000000000 0000000000000000
[   22.292990] Call Trace:
[   22.292994]  [<ffffffff818e42b9>] dump_stack+0x4c/0x65
[   22.292997]  [<ffffffff8107666a>] warn_slowpath_common+0x8a/0xc0
[   22.292999]  [<ffffffff810766e6>] warn_slowpath_fmt+0x46/0x50
[   22.293006]  [<ffffffffa0146810>] drm_wait_one_vblank+0x180/0x190 [drm]
[   22.293028]  [<ffffffffa03386bf>] ? intel_runtime_pm_get+0x4f/0x80 [i915]
[   22.293053]  [<ffffffffa0397e97>] intel_finish_crtc_commit+0x187/0x190 [i915]
[   22.293058]  [<ffffffffa0289786>] drm_plane_helper_commit+0x176/0x2c0 [drm_kms_helper]
[   22.293062]  [<ffffffffa028996a>] drm_plane_helper_update+0x9a/0xf0 [drm_kms_helper]
[   22.293085]  [<ffffffffa03992d0>] __intel_set_mode+0xa40/0xdf0 [i915]
[   22.293109]  [<ffffffffa039f922>] intel_crtc_set_config+0x302/0x650 [i915]
[   22.293120]  [<ffffffffa014fde6>] drm_mode_set_config_internal+0x66/0x100 [drm]
[   22.293125]  [<ffffffffa02925c8>] restore_fbdev_mode+0xc8/0xf0 [drm_kms_helper]
[   22.293130]  [<ffffffffa02945e9>] drm_fb_helper_restore_fbdev_mode_unlocked+0x29/0x80 [drm_kms_helper]
[   22.293134]  [<ffffffffa0294662>] drm_fb_helper_set_par+0x22/0x50 [drm_kms_helper]
[   22.293138]  [<ffffffffa029456f>] drm_fb_helper_hotplug_event+0x8f/0xe0 [drm_kms_helper]
[   22.293163]  [<ffffffffa03aec1e>] intel_fbdev_output_poll_changed+0x1e/0x30 [i915]
[   22.293167]  [<ffffffffa028875b>] drm_kms_helper_hotplug_event+0x2b/0x40 [drm_kms_helper]
[   22.293170]  [<ffffffffa0288971>] output_poll_execute+0x1a1/0x1c0 [drm_kms_helper]
[   22.293172]  [<ffffffff8108fad8>] process_one_work+0x158/0x490
[   22.293174]  [<ffffffff81090733>] worker_thread+0x73/0x580
[   22.293176]  [<ffffffff810906c0>] ? rescuer_thread+0x400/0x400
[   22.293177]  [<ffffffff81095e9f>] kthread+0xef/0x110
[   22.293178]  [<ffffffff81095db0>] ? kthread_create_on_node+0x180/0x180
[   22.293180]  [<ffffffff818ecb62>] ret_from_fork+0x42/0x70
[   22.293181]  [<ffffffff81095db0>] ? kthread_create_on_node+0x180/0x180
[   22.293182] ---[ end trace edbfc823b56440b6 ]---
[   22.346595] ata2: SATA link up 6.0 Gbps (SStatus 133 SControl 300)


To reproduce:

        git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
        cd lkp-tests
        bin/lkp install job.yaml  # job file is attached in this email
        bin/lkp run     job.yaml

Thanks,
Ying Huang

View attachment "config-4.1.0-rc2-00294-g8c7b5cc" of type "text/plain" (137247 bytes)

Download attachment "dmesg.xz" of type "application/octet-stream" (17052 bytes)

Download attachment "job.yaml" of type "application/x-yaml" (3343 bytes)

View attachment "reproduce" of type "text/plain" (323 bytes)

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